Niagara Cutter N89730 Carbide Square Nose End Mill, Double End, Inch, Uncoated (Bright) Finish, Roughing and Finishing Cut, 30 Degree Helix, 2 Flutes, 3" Overall Length, 0.500" Cutting Diameter, 0.500" Shank Diameter Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material Double-end square nose end mills create sharp, unrounded cuts and have cutting edges on both ends for longer tool life Stub length is used in applications with shallow depth of cut to increase the strength of the cutting edge and reduce the risk of breakage Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures Uncoated (bright) tools have no additional surface treatment or coating for use on a broad range of materials